GATE 2022 ME (ME2) – Question 21
Match the additive manufacturing technique in Column I with its corresponding input material in Column II.
| Technique | Input material |
|---|---|
| P. Fused deposition modelling | 1. Photo sensitive liquid resin |
| Q. Laminated object manufacturing | 2. Heat fusible powder |
| R. Selective laser sintering | 3. Filament of polymer |
| 4. Sheet of thermoplastic or green compacted metal sheet |
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Correct answer: (A) P-3, Q-4, R-2
Explanation
Match each process with the material it starts from.
- **P, Fused Deposition Modelling (FDM):** a heated nozzle extrudes a thermoplastic **filament** (3).
- **Q, Laminated Object Manufacturing (LOM):** sheets are bonded layer by layer and cut with a laser or knife, so the input is a **sheet** of thermoplastic or green compacted metal (4).
- **R, Selective Laser Sintering (SLS):** a laser fuses **heat-fusible powder** (2).
The photosensitive liquid resin (1) is the input for photopolymerisation processes such as stereolithography, so it matches none of these.
Answer: **P-3, Q-4, R-2** (option A).